Bug#18817, removing --binlog-format option from .opt files

mysql-test/suite/rpl/t/rpl_row_err_daisychain-master.opt

---binlog-format=row

mysql-test/suite/rpl/t/rpl_row_err_daisychain-slave.opt

---binlog-format=statement --log-slave-updates

mysql-test/suite/rpl/t/rpl_truncate_7ndb_2-master.opt

---binlog-format=mixed

mysql-test/suite/rpl/t/rpl_truncate_7ndb_2.test

 # Same test as rpl_truncate_7ndb.test, but with mixed mode
 # This is marked with 'big_test' just because the rpl_truncate_7ndb test is
 # so slow...
-
+--source include/have_binlog_format_mixed.inc
 --source include/big_test.inc
 --source t/rpl_truncate_7ndb.test